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- head 1.2;
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- version39-41:1.1;
- locks;
- comment @ * @;
-
-
- 1.2
- date 92.08.09.20.45.35; author amiga; state Exp;
- branches;
- next 1.1;
-
- 1.1
- date 92.05.14.19.55.40; author mwild; state Exp;
- branches;
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-
-
- desc
- @get/release exclusive access to a struct file
- @
-
-
- 1.2
- log
- @add new sleep parameter
- @
- text
- @/*
- * This file is part of ixemul.library for the Amiga.
- * Copyright (C) 1991, 1992 Markus M. Wild
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * $Id: get_file.c,v 1.1 1992/05/14 19:55:40 mwild Exp $
- *
- * $Log: get_file.c,v $
- * Revision 1.1 1992/05/14 19:55:40 mwild
- * Initial revision
- *
- */
-
- #define KERNEL
- #include "ixemul.h"
-
- #ifdef DEBUG
- #define DP(a) kprintf a
- #else
- #define DP(a)
- #endif
-
- int
- __get_file (struct file *f)
- {
- int res = 0;
-
- Forbid ();
- for (;;)
- {
- if (!(f->f_sync_flags & FSFF_LOCKED))
- {
- f->f_sync_flags |= FSFF_LOCKED;
- /* got it ! */
- break;
- }
- f->f_sync_flags |= FSFF_WANTLOCK;
- DP(("__get_file: TYPE=%ld, name=%s going to sleep\n",
- f->f_type, f->f_type == DTYPE_FILE ? f->f_name : "`na'"));
- if (ix_sleep (& f->f_sync_flags, "get_file") < 0) /* error in sleep, might be INTR */
- {
- DP(("__get_file interrupted\n"));
- res = -1;
- break;
- }
- /* have to always recheck whether we really got the lock */
- }
- Permit ();
- return res;
- }
-
-
- void
- __release_file (struct file *f)
- {
- Forbid ();
- if (f->f_sync_flags & FSFF_WANTLOCK)
- ix_wakeup (& f->f_sync_flags);
-
- f->f_sync_flags &= ~(FSFF_WANTLOCK|FSFF_LOCKED);
- Permit ();
- }
- @
-
-
- 1.1
- log
- @Initial revision
- @
- text
- @d19 1
- a19 1
- * $Id$
- d21 4
- a24 1
- * $Log$
- d53 1
- a53 1
- if (ix_sleep (& f->f_sync_flags) < 0) /* error in sleep, might be INTR */
- @
-